name: Tests with minimum versions

on:
  push:
    branches:
      - master
  pull_request: {}
  schedule:
    - cron: '0 23 * * SUN-THU'
  workflow_dispatch:

concurrency:
  group: ${{ github.workflow }}-${{ github.ref == 'refs/heads/master' && github.run_number || github.ref }}
  cancel-in-progress: true

jobs:
  tests-with-minimum-versions:
    if: (github.event_name == 'schedule' && github.repository == 'optuna/optuna') || (github.event_name != 'schedule')
    runs-on: ubuntu-latest

    strategy:
      matrix:
        python-version: ['3.7', '3.8', '3.9']

    services:
      redis:
        image: redis
        options: >-
          --health-cmd "redis-cli ping"
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5

    steps:
    - name: Checkout
      uses: actions/checkout@v4

    - name: Setup Python${{ matrix.python-version }}
      uses: actions/setup-python@v5
      with:
        python-version: ${{ matrix.python-version }}

    - name: Setup cache
      uses: actions/cache@v3
      env:
        cache-name: test-with-minimum-versions
      with:
        path: ~/.cache/pip
        key: ${{ runner.os }}-${{ matrix.python-version }}-${{ env.cache-name }}-${{ hashFiles('**/setup.py') }}-v1
        restore-keys: |
          ${{ runner.os }}-${{ matrix.python-version }}-${{ env.cache-name }}-${{ hashFiles('**/setup.py') }}


    - name: Setup pip
      run: |
        python -m pip install --upgrade pip
        pip install --progress-bar off -U setuptools

    - name: Install
      run: |
        # Install minimal dependencies and confirm that `import optuna` is successful.
        pip install --progress-bar off .
        python -c 'import optuna'
        optuna --version

        pip install --progress-bar off .[test]
        pip install --progress-bar off .[optional] --extra-index-url https://download.pytorch.org/whl/cpu
        # TODO(c-bata): Remove a version constraint after releasing https://github.com/cunla/fakeredis-py/pull/303
        pip install --progress-bar off 'fakeredis[lua]<2.21.2'

    - name: Install dependencies with minimum versions
      run: |
        # Install dependencies with minimum versions.
        pip uninstall -y alembic cmaes packaging sqlalchemy plotly scikit-learn
        pip install alembic==1.5.0 cmaes==0.10.0 packaging==20.0 sqlalchemy==1.3.0 numpy==1.20.3 tqdm==4.27.0 colorlog==0.3 PyYAML==5.1
        pip install plotly==5.0.0 scikit-learn==0.24.2  # optional extras

    - name: Output installed packages
      run: |
        pip freeze --all
    - name: Output dependency tree
      run: |
        pip install pipdeptree
        pipdeptree

    - name: Scheduled tests
      if:  ${{ github.event_name == 'schedule' || github.event_name == 'workflow_dispatch' }}
      run: |
        pytest tests

    - name: Tests
      if:  ${{ github.event_name != 'schedule' && github.event_name != 'workflow_dispatch' }}
      run: |
        pytest tests -m "not slow"
